Role of organic additives in the sol-gel synthesis of porous CaF2 anti-reflective coatings

Shinobu Fujihara; Yasuhiro Kadota; Toshio Kimura

doi:10.1023/A:1015252010509

Role of organic additives in the sol-gel synthesis of porous CaF₂ anti-reflective coatings

Shinobu Fujihara, Yasuhiro Kadota, Toshio Kimura

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Porous CaF₂ anti-reflective coating films were prepared by the sol-gel method. Effects of organic additives on deposition and optical properties of the films were investigated. Amino alcohols (2-aminoethanol, 2-dimethylaminoethanol, and triethanolamine) and alcohols with larger molecular weights (ethyleneglycol, 2-methoxyethanol, cyclohexanol, and 2-(2-n-butoxyethoxy)ethanol) were chosen as the organic additives. Among these additives, cyclohexanol was the most effective to control the surface morphology and the optical properties of the films. By changing the amount of cyclohexanol in the coating solution, it was possible to control the optical thickness of the CaF₂ films. Accordingly, the wavelength giving the maximum transmittance could be changed in the UV region.

Original language	English
Pages (from-to)	147-154
Number of pages	8
Journal	Journal of Sol-Gel Science and Technology
Volume	24
Issue number	2
DOIs	https://doi.org/10.1023/A:1015252010509
Publication status	Published - 2002 Jun 1

Keywords

Anti-reflective coating
CaF
Sol-gel
Thin film

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Biomaterials
Condensed Matter Physics
Materials Chemistry

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